Recoil-gun.



No. 793,840. PATENTED JULY 4, 1905. 0. LAUBER.

REUOIL GUN.

APPLIOAWN FILED MAR. 13. 1905. N N My -Q UNITED STATES Patented July 4,1905.

PATENT OFFICE.

OTTO LAUBER, OF ESSEN-ON-THE-RUHR, GERMANY, ASSIGNOR TO FRIED.

KRUPP AKTIENGESELLSOHAFT, OF ESSEN-ON-THE-RUHR, GERMANY.

RECOlL-GUN.

SPECIFICATION forming part of Letters Patent No. 793,840, dated July 4,1905.

Application filed March 13, 1905. Serial No. 249,846.

To all w/wm it may concern:

Be it known that I, OTTO LAUBER, a subject of the German Emperor, and aresident of Essen-on-the-Ruhr, (VVest,) Germany, have invented certainnew and useful Improvements in Recoil-Guns, of which the following is aspecification.

The present invention relates to recoil-guns; and the object of theinvention is to improve the means for securing the brake-cylinder to thegun-barrel and for .incasing the recuperator-spring forming part of thesubject-matter of my United States patent application filed September13, 1901, Serial No. 75,295.

In the accompanying drawings, in which I have by the way of exampleshown the invention applied to guns with long recoil, Figure 1 is a sideView, partly in section, of the parts of the gun having relation to myinvention; and Fig. 2 is a section on line 2 2 of Fig. 1 and seen from.the right.

As in the previous United States patent application referred to, thebrake-cylinder is connected with the horn b of the gun-barrel B by meansof a screw-spindle O-of such a length that it may simultaneously be usedas a tension-screw for the recuperator-spring D. At front therecuperator spring D rests against a collar 0 on the brake-cylinder,which partakes of the gun-barrels recoil movement, and at rear it restsagainst an abutment F, rigidly connected to the stationary cradle E.

The screw-spindle O engages the internallythreaded rear portion of acylindrical sleeve G, that is arranged coaxially with the brakecylinderA and firmly screwed into the same at a The rear end of the sleeve isprovided with a shoulder g and a projection 9 the latter projecting intoa bore in the horn b. At front the sleeve is closed by a head g and forthe greater part of its length the sleeve is of a width that is lessthan the diameter of the bore of the brake-cylinder. In order to makethe spindle C as light as possible, the part of the spindle that doesnot engage the threads of the sleeve is provided with a central bore 0.For the purpose of supporting the free end of the sleeve G and thescrewspindle O within the brakecylinder the sleeve is provided withthree exterior radially-projecting studs g*, and the inner face of thesleeve-head g is provided with a tap g that is coaxial with the threadsof the sleeve G and abuts against the wall of the bore 0 of the screw 0.

The-incasing of the recuperator-spring D and the securing of thebrake-cylinderto the gun-barrel are accomplished as follows: After .therecuperator-spring has been shoved onto the brake-cylinder the latter isinserted in the cradle E from the front and the spring compressed untilthe screw O, with its head against the horn b, engages the internalthreads of the sleeve G. Then the screw is turned in and the projectiong of the sleeve G passes into the bore of the horn 6, while the tap g ofthe sleeve enters the bore 0 in the screw 0, and the screwing iscontinued until the shoulder g of the sleeve G abuts against the horn b.

The advantage of the present invention over the construction shown inthe previous United States patent referred to will be readily understoodfrom the following comparison: In the prior application thescrew-spindle for securing the brake-cylinder on the gun-barrel and forimparting tension to the recuperatorspring projects into a hollow spacein the brake-cylinder and a partition-wall separates.

the hollow space from the space for the brake fluid. The partition-wallis employed for the purpose of obviating a stufling-box for thescrew-spindle. The arrangment of the partition-wall, however, results ina considerable reduction in the capacity of the brake-cylinder for thebrake fluid. In the present invention the arrangement of the sleeve Gdoes away with this drawback and at the same time does not necessitatethe use of a stuffingbox for the screw O. Moreover, the studs g and thetap g which support the free end of the screw O in the surroundinghollow space, prevent the screw, from vibrating during travel or duringfiring. Such vibration is likely to cause change in the textures of thematerial of the screw, with consequent impairment of its security. Thelast-named advantage might be obtained in the construction shown in theprior application referred to by providing, for instance, on thepartition-wall a boss for supporting the free end of the screw, as doesthe tap g of the sleeve G in the present invention.

Having thus described the invention, the following is what is claimed asnew:

1. In a recoil-gun of the character described, the means for securingthe brake-cylinder to the gun, projecting into the brake-cylinder, andhaving a housing spaced from the walls of the brake-cylinder.

2. In a recoil-g un of the character described, the means for securingthe brake-cylinder to the gun, projecting into the brake-cylinder, andhaving a housing spaced from the walls of the brake-cylinder, andprovided with means for supporting its free end within thebrakecylinder.

OTTO LAUBER.

In presence of H ARRY S. M m rom), Frau P FUD EL.

